Select an ESP8266 module, modified ESP-01 or ESP-12 which is soldered to an ESP-12toESP-01 converter board.

Additional Light Sensor

MAX44009 or VEML6070 will be soldered to the back of the TeHyBug PCB because the front panel is taken by the BME680 sensor. In case you selected an additional OLED display option, then the sensor will be connected with 10cm long wires to the TeHyBug PCB.

Display

The display will be soldered to the TeHyBug PCB on the back side, if you don't want it to be soldered to the PCB please leave a note. With an oled display a battery powered "power saving mode" will not work anymore, you should use a different power source

Which environmental data it measures?

Which sensor type it uses?

It uses a high precision Air Quality, Temperature, Humidity and Barometric Air Pressure sensor:

Type: BME680 sensor

Accuracy resolution: 0.1

Barometric pressure range: 300-1100 hPa

Temperature range: -40-85°C

Humidity range: 0-100%

Barometric pressure precision: ±1 hPa absolute accuracy

Temperature measurement precision: ±1.0°C

Humidity precision: ±3%

Please note this sensor, like all VOC/gas sensors, has variability and to get precise measurements you will want to calibrate it against known sources! Please run this sensor for 48 hours when you first receive it to "burn it in". After that period of time, the sensor should deliver usable data for air quality.

Which data serving options are available?

Serving data as a Web-Server on port 80 in form of HTML code or JSON format.

Showing the environmental data on an OLED display.

Receive alerts with a sensor to your mobile phone or via email.

What is it?

TeHyBug (TemperatureHumidity Spy Bug) the is ultimate low power environmental data spy-bug for your home. It logs an environmental data periodically and sends it to the TeHyBug-Server, your own web server or MQTT broker like a Raspberry Pi, where you can view the data in a nice daily/hourly graph.
Measure the environmental data in your private server room, basement, storeroom, library, etc..

What makes it special?

Create your own weather station.
Put it at any place where your wifi network is available. The battery lasts for several months! In our testing environment, the TeHy-Bug with the DHT22 sensor is collecting data for more than a half year. It uses a single 3,7 Volt 18650 LiPo-Cell (depends on sending data frequency and battery type).

What you get?

A soldered, ready to use TeHyBug, with modified ESP8266 ESP-01 module (modification enables the deep sleep mode for power saving).

The module includes pre-flashed and preinstalled environmental data logging software.

Detailed first start instructions.

Battery not included

How to start data logging with it?

Before going live with environmental data measurement, you'll have to connect your TeHyBug with a browser to set up an HTTP URL of the data web server and provide your wifi network credentials for internet connection.

Requirements.

The module requires a 3.4 to 11 Volt input voltage. It also requires a connection to a wifi network to send the sensor data.

How to configure the device?

The device has a preinstalled code.
In a setup mode, it acts as a wifi station,
you'll have to connect your computer to a wifi network TeHyBug_xxxxx
and open in your browser the URL: http://192.168.1.1/
a configuration web page will open, where you'll have to provide your wifi credentials so that your TeHyBug can connect to the internet, you will have two choices:

to use a tehybug.com server as a data server (you'll have to signup at tehybug.com for this and provide your unique TeHyBug key in your account),

or to use your own web host like Raspberry Pi or any other web host for data fetching where you'll be able to set your own custom URL,

or to use your own MQTT broker like Raspberry Pi or any other MQTT broker for publishing sensor data where you'll be able to set your own MQTT host,

or use Blynk, thingspeak or Domoticz home automation system for logging and displaying data.

You don't need to code a data-logging script, I have developed a tehybug.com site that will display the data graph.

You don't need to modify the ESP8266 module for power saving, you'll get already modified module.

All you need is to configure your wifi credentials as described above.

If you'd like to set up your own data server, you can use simple PHP data logging code example from here: https://github.com/gumslone/tehybug

How to improve TeHyBug's battery life and increase its battery operation time?

The battery life depends on the data-frequency you set for your TeHyBug. The TeHyBug consumes most of the power during the data measurement and wifi connection, once wifi connection is established and the sensor data is sent to the data server, the ESP8266 chip goes into a power saving deep-sleep mode. In battery powered mode the data-frequency should be set to 30 minutes or more. It also depends on the battery type that you use, by default you receive a TeHyBug with a 9v battery connector, so you can easily use it with a 9v battery. The 9v batteries have a low Ampere-hour capacity so it's recommended to keep the data-frequency high. TeHyBug supports different batteries from 3.4V to a maximum 11V, so you can use other batteries with it too. In case, you want it to measure the data very often (i.e. every 5 minutes or less), it is recommended to use a power supply, for example, a USB power supply for your TeHyBug.

The higher you set the data-frequency, the longer your TeHyBug will operate in a battery powered mode.

The more Ah the battery has, the longer your TeHyBug will operate in a battery powered mode.

Select an ESP8266 module, modified ESP-01 or ESP-12 which is soldered to an ESP-12toESP-01 converter board.

Additional Light Sensor

MAX44009 or VEML6070 will be soldered to the back of the TeHyBug PCB because the front panel is taken by the BME680 sensor. In case you selected an additional OLED display option, then the sensor will be connected with 10cm long wires to the TeHyBug PCB.

Display

The display will be soldered to the TeHyBug PCB on the back side, if you don't want it to be soldered to the PCB please leave a note. With an oled display a battery powered "power saving mode" will not work anymore, you should use a different power source

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